diff --git a/.gitmodules b/.gitmodules
index 39396d17..34b311cf 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -478,3 +478,6 @@
 [submodule "repos/NonlinearCircuits"]
 	path = repos/NonlinearCircuits
 	url = https://github.com/mhetrick/nonlinearcircuits.git
+[submodule "repos/HamptonHarmonics"]
+	path = repos/HamptonHarmonics
+	url = https://gitlab.com/hampton-harmonics/hampton-harmonics-modules.git
diff --git a/repos/HamptonHarmonics b/repos/HamptonHarmonics
new file mode 160000
index 00000000..fe377c5d
--- /dev/null
+++ b/repos/HamptonHarmonics
@@ -0,0 +1 @@
+Subproject commit fe377c5d2bae414de09e78643a146c312ed14104